package com.atguigu.gulimall.product.service.impl;

import com.atguigu.gulimall.product.config.MyThreadConfig;
import com.atguigu.gulimall.product.entity.SkuImagesEntity;
import com.atguigu.gulimall.product.entity.SpuInfoDescEntity;
import com.atguigu.gulimall.product.service.*;
import com.google.common.collect.Lists;

import com.atguigu.common.utils.PageUtils;
import com.atguigu.common.utils.Query;
import com.atguigu.gulimall.product.dao.SkuInfoDao;
import com.atguigu.gulimall.product.entity.SkuInfoEntity;
import com.atguigu.gulimall.product.vo.SkuItemVo;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;

import java.math.BigDecimal;
import java.util.List;
import java.util.Map;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ThreadPoolExecutor;


@Service("skuInfoService")
@Slf4j
public class SkuInfoServiceImpl extends ServiceImpl<SkuInfoDao, SkuInfoEntity> implements SkuInfoService {
    @Autowired
    private SkuImagesService skuImagesService;
    @Autowired
    private SpuInfoDescService spuInfoDescService;
    @Autowired
    private AttrGroupService attrGroupService;
    @Autowired
    private SkuSaleAttrValueService skuSaleAttrValueService;
    @Autowired
    private ThreadPoolExecutor executor;

    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        IPage<SkuInfoEntity> page = this.page(
                new Query<SkuInfoEntity>().getPage(params),
                new QueryWrapper<SkuInfoEntity>()
        );

        return new PageUtils(page);
    }

    @Override
    public void saveSkuInfo(SkuInfoEntity skuInfoEntity) {
        this.save(skuInfoEntity);
    }

    /**
     * key: 1
     * catelogId: 225
     * brandId: 9
     * min: 2
     * max: 6
     *
     * @param params
     * @return
     */
    @Override
    public PageUtils queryPageByCondition(Map<String, Object> params) {
        QueryWrapper<SkuInfoEntity> queryWrapper = new QueryWrapper<>();
        String key = (String) params.get("key");
        if (StringUtils.hasText(key)) {
            queryWrapper.and(item -> {
                item.eq("sku_id", key)
                        .or()
                        .like("sku_name", key);
            });
        }
        String catelogId = (String) params.get("catelogId");
        if (StringUtils.hasText(key) && !"0".equalsIgnoreCase(catelogId)) {
            queryWrapper.eq("catalog_id", catelogId);
        }
        String brandId = (String) params.get("brandId");
        if (StringUtils.hasText(brandId) && !"0".equalsIgnoreCase(brandId)) {
            queryWrapper.eq("brand_id", brandId);
        }
        String min = (String) params.get("min");
        if (StringUtils.hasText(min)) {
            queryWrapper.ge("price", min);
        }
        String max = (String) params.get("max");
        if (StringUtils.hasText(brandId)) {
            // 判断 最大值应该大于0 才做查询
            try {
                BigDecimal bigDecimal = new BigDecimal(max);
                if (bigDecimal.compareTo(new BigDecimal(0)) == 1) {
                    queryWrapper.le("price", max);
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        IPage<SkuInfoEntity> page = this.page(new Query<SkuInfoEntity>().getPage(params), queryWrapper);
        return new PageUtils(page);
    }

    @Override
    public List<SkuInfoEntity> getSkusBySpuId(Long spuId) {
        List<SkuInfoEntity> spuInfos = this.list(new QueryWrapper<SkuInfoEntity>().eq("spu_id", spuId));
        return spuInfos;
    }

    @Override
    public SkuItemVo item(Long skuId) {
        long currentTimeMillis = System.currentTimeMillis();
        SkuItemVo skuItemVo = new SkuItemVo();
        // 1、sku基本信息获取 pms_sku_info
        CompletableFuture<SkuInfoEntity> infoFuture = CompletableFuture.supplyAsync(() -> {
            SkuInfoEntity skuInfoEntity = baseMapper.selectById(skuId);
            skuItemVo.setInfo(skuInfoEntity);
            return skuInfoEntity;
        }, executor);
        CompletableFuture<Void> saleAttrsFuture = infoFuture.thenAcceptAsync(res -> {
            // 3、获取sku的销售属性组合
            List<SkuItemVo.SkuItemSaleAttrVo> skuItemSaleAttrVos = skuSaleAttrValueService.getSaleAttrsBySpuId(res.getSpuId());
            skuItemVo.setSaleAttr(skuItemSaleAttrVos);
        }, executor);
        CompletableFuture<Void> descFuture = infoFuture.thenAcceptAsync(res -> {
            // 4、获取spu的介绍
            SpuInfoDescEntity spuInfoDesc = spuInfoDescService.getById(res.getSpuId());
            skuItemVo.setDesc(spuInfoDesc);
        }, executor);
        CompletableFuture<Void> attrGroupFuture = infoFuture.thenAcceptAsync(res -> {
            // 5、获取spu的规格参数信息
            List<SkuItemVo.SpuItemAttrGroupVo> attrGroupVos =
                    attrGroupService.getAttrGroupWithAttrsBySpuId(res.getSpuId(), res.getCatalogId());
            skuItemVo.setGroupAttrs(attrGroupVos);
        }, executor);
        CompletableFuture<Void> imagesFuture = CompletableFuture.runAsync(() -> {
            // 2、sku的图片信息 pms_sku_images
            List<SkuImagesEntity> images = skuImagesService.getImagesBySkuId(skuId);
            skuItemVo.setImages(images);
        }, executor);
        // 等待所有任务完成 才获取值
        try {
            CompletableFuture.allOf(saleAttrsFuture, descFuture, attrGroupFuture, imagesFuture).get();
            long end = System.currentTimeMillis();
            log.info("请求耗时" + (end - currentTimeMillis));
            return skuItemVo;
        } catch (Exception e) {
            log.error("完成任务过程中出现异常{}", e);
        }
        return null;
    }

}